CosmoVerse@Krakow: Özgür Akarsu: Recent developments in LsCDM Cosmology: A new concordance model

This series is the recording of the CosmoVerse@Krakow conference that happened between 9 and 11 July 2024.

Özgür Akarsu:

Recent theoretical and observational developments in LsCDM Cosmology: On track to a new concordance model

Sign-switching cosmological constant cold dark matter ($\Lambda_{\rm s}$CDM) cosmology has emerged as a compelling new paradigm, demonstrating unprecedented success in aligning with observational data from various datasets and effectively resolving major cosmological tensions. This model is characterized by a minimal deviation from the standard $\Lambda$CDM model, proposing a rapid Anti-de Sitter (AdS) to de Sitter (dS) transition in the late universe ($z_\dagger\sim 1.7$), inspired by the graduated dark energy (gDE) model. In this talk, we will first provide a concise introduction to $\Lambda_{\rm s}$CDM cosmology. We will then discuss the latest theoretical and observational developments that underscore $\Lambda_{\rm s}$CDM as a promising candidate or guide for a new concordance cosmological model of the Universe.

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